<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<input type="button" value="按钮" onclick="fm()">
<script>
    function fn() {
        for (let i = 0; i < 10; i++) {
            alert(i)
        }
    }
    //1.无参无返回值
    function f1() {
        alert("f1")
    }
    //f1()//调用
    //2.有参无返回值
    function f2(name,age) {
        alert(name+":"+age)
    }
    //f2("张飞",18)
    //3.
    function f3() {
        return "我是返回值"
    }
    let info = f3()
    //alert(info)
    //4. 有参有返回值
    function f4(x,y) {
        return x*y
    }
    let result =f4(5,9)
    //alert(result)
    //5.第二种声明方法的格式
    let f5 = function (name,age) {
        alert(name+":"+age)
    }
    //f5("张三",50)

    //6. 第三种声明方法的格式
    let f6 = new Function("name","age","alert(name+':'+age)")
    //f6("赵云",70)

















</script>
</body>
</html>